**Prof. Ramkrishna More College Akurdi, Pune-411 044.
S. S. V. P S's, L.K., Dr.P.R.Ghogrey Science College, Dhule-424005.
The levels of Na, Ca, K and Mg in the gills, liver, kidney and muscle of Puntius arenatus (Day) decreased due to exposure to monocrotophos.
Toxicity, Monocrotophos, Ions, Pun1ius arenatus (Day)